1. Transparent activity style.
First, you need to create a transparent activity. Add this style to styles.xml:
Any activity that has this style as a theme will be transparent.
2. Activity with a simple dialog.
Now lets create an activity that will show a simple dialog:
public class MainActivity extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setMessage("Message")
.setTitle("Title")
.setCancelable(false)
.setPositiveButton("OK", new DialogInterface.OnClickListener()
{
public void onClick(DialogInterface dialog, int id)
{
MainActivity.this.finish();
}
});
AlertDialog alert = builder.create();
alert.show();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
}
3. Broadcast receiver.Obviously you need a broadcast receiver that handles ACTION_BOOT_COMPLETED broadcast (note that you need a permission to receive the broadcast):
public class OnBootReceiver extends BroadcastReceiver
{
@Override
public void onReceive(Context context, Intent intent)
{
Intent startIntent = new Intent(context, MainActivity.class);
startIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(startIntent);
}
}
4. Android manifestIn your manifest you must assign the created style for your activity and register the broadcast receiver. It should look something like this (note that you need a permission to receive the broadcast):
That's pretty much all you need to show a dialog after the device's boot is complete. Source code can be obtained from Github.
